Tumbling mill



Oct. 11, 1932.

L. D. PEIK TUMBLING MILL Original Filed May 28. 1929 3 Sheets-Sheet 1 INVENTOR. Zaazs J Fez ATT wh a

L. D. PEIK 1,882,443

TUMBLING MILL Original Filed May 28. 1929 3 Sheets-Sheet 2 INVENTOR. Zoaa's Z Pal BYMUJZ M A TTORNEYS.

Oct; 11, 1932. 1.. D. PE IK 3 TUMBLING HILL I Original Filed Ma 28. 1929 3 Sheets-Sheet :5

707' I s 107 mi INVENTOR. F 1 5 lauds fl P6275 A TTORNEYS.

mama- 1 a. 11, 1932 UNITED! srATE's PATENT OFFICE LOUISFD. PEIK, OF MISHAWAKA, INDIANA, ASSIGNQR TO THE AMERICAN FOU N'DBY ,4

i EQUIPMENT COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE TUMIBLING MILL Application filed May 28 1929, Serial No. 366,574.' Renewed March 10, 19l32.

The invention relates to tumbling mills for I smoothing rough castings and the like.

' Accordlng to one form of the invention, the

mill comprises a stationary casing in which 3'5 is positioned a traveling conveyor or belt so arranged as to provide a receptacle for the articles treated. In effect, a tumbling barrel is formed havinga stationary segment pro vided by the casing and a movable segment ilo provided by the conveyor. The conveyor may be made up of a pair of chains located outside the barrel proper, the links of the chain: being connected b .the conveyorsurfaces. hese aprons have ifl spaces through which the spent abrasive which has been directed upon the articles treated may fall. Suitable'means are profvided for removing the abrasive which has I passed through the conveyor and carrying it back to the blast nozzles whereby it canzbe used over and over again. The arrangement may beqsuch that the conveyor moves in one *direction to tumbleth'e articles and, when re-, versed, the articles are quickly ejected from the machine through the charge opening.

. I The inventionalso consistsin certain new and original features oi construction and combinations of parts hereinafter set forth and claimed.v Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to 'its objects and'advantages, the mode of its 35 operation and the manner of its organization ma be better understood by referring to the 0 owing description taken in connection 7 with the accompanying drawings forming, a part thereof, in which I Fi 1; is a vertical section throughthe 'tumb ing mill Fig.. 2 is a transverse section taken on the line-2-2 of Fig. 1; x Fig. 3 is a fragmentary veportand igs.4 and 5 are sections taken on the lines 49-4 and 5-5 respectively of Fig. 3.

Like. reference characters denote like parts in'the several figures of thedrawings. ..,In the following description and in the detail of the conaprons forming claims parts will be identified by specific names for convenience, but they are intended to be as generic in their application to similar parts as the art will permit.

Referring to the drawings, the tumbling mill comprises a stationary casing 4 enclosing a movable segment '5. This casing 4 is made. up of a pair of end walls 6 and 7 to which the several side wall-plates 8 are secured. The end walls 6 and 7 are preferably castings suitably ribbed for strength and having suitable attaching brackets and flanges cast integral therewith, to which a plurality of transverse channels 9 are secured connecting the end walls 6 and 7. The sev eral side wall plates 8 are secured to the end walls 6 and? and to these channels 9. These.

plate members include an upper sheet 10 in the form of an angle having a depending wall and an exhaust sheet 11 having aplurality of exhaust pipes 12 connected thereto.

The casing end walls 6 and 7 are rovided' liner plate 41 with theofli'set flange 40 form-' ing'a circular groove 42 for a purpose hereinafter describe Cooperating with the casing 4 and with the with hollow bosses 34 and 35 in w ich are barrel'heads 38 and 39 and, forming the movable segment is the endless conveyor 5 suitably supported upon three pairs of sprockets e3, 44 and 45, these sprockets being supported on suitable shafts, two sprockets on each shaft. Secured to the casing end walls 6 and 7, one on each side, are track members 46 and 47 for supporting the endless chain at .c

the point where the articles to be treated exert their weight. Disposed between the upper and lower plys of the chain is an abrasive pan 48, this pan extending from a point near the sprockets 43 all the way up'to the upper sprocket 4:5 and having its bottom in the shape of a transverse trough. Disposed in i this trough is a worm conveyor 49 suitably driven by a sprocket 76 outside the casing.

' The movable segment or traveling conveyor is made up of chains'52, 53, one on each side, running on the sprockets 43, 44, 45 on each side. of links 54 connected by pins 55 having rollers 56 thereon.

Each link 54 has spaced side walls 100 and a connecting top wall 101, the side walls being spaced apart greater at one end than at the other end to receive the smaller end of the adjoining link. The pivot pin 55 which has a head at one end passes through the overlapping side walls 100, and a suitable cotter pin 102 passes through the other end of the pin 55. I

The side wall 100 of each link is provided with a lateral extension 57 having strengthening ribs 103 on its underside, the extension ending in a flat seat 104 having a lateral notch 105. The extension is provided with an upstanding diagonal flange 59 having ends overlapping the ends of the similar flanges on adjoining links. These flanges 59 fit within the channel 42 on the movable barrel heads, as indicated in Fig. 2.

Seated on each seat 104 is a pair of angle irons or aprons 58 extending from one chain 'the length of the barrel to the other chain.

One flange 106 of eachangle iron 58 fits within the notch 105 and the other flange 107 is securely fastened to the seat by suitable fastening devices 108. These angle iron aprons 58 form the supporting surface for the articles which are being treated.

These angles or aprons 58 are spaced apart as shown, so that, after the sand or other abrasive has been spent on the articles, the abrasive falls through into the abrasive pan 48. "It will be noted that the chains 52, 53 are outside of the blasting chamber and are therefore protected from the direct force of the blasting, while only exposed to the blasting are the angle irons 58 and the liners 41 on the barrelheads, all of which may be replaced when worn. The chain rollers 56 ride on tracks 46, 47, thereby insuring proper support for the weight of the articles being treated, which may be considerable.

The casing is provided with a composite door 13 comprising anupper section 16 and a lower section 17, this door closing the charge opening. The sections are suitably' pivoted together by hinges 18 and the upper section is suitably pivoted to the casing by a hinge 21. The lower door section 17 carries suitable nozzle holders 29 for supporting nozzles (not shown) which direct abrasive such as sand on the articles to be treated. Driving the entire apparatus is a belt pulley 82 suitably journalled in a casing end wall on a suitable shaft which also supports a pinion 83.v The shaft 84 for the lower sprockets 44 which is the drive'shaft for the movable segment 5 has mounted thereon a spur gear 85 which is driven by'the pinion 83. Also mounted on this shaft is a sprocket These chains are made up of a series .rotate the pulley 82 in such holders 29. The surface of the artlcles and the spent abrasive- 8.6 on which is mounted a sprocket chain 87 driving the sprocket 76 and one way clutch 73.

The casing ends are provided with adjustable devices 88 for supporting the upper shaft 89 carryin sprockets 45. These devices 88 may be use for properly tensioning the conveyor, or the weight of the conveyor may be utilized for properly tensioning the conveyor, thus making a selfstightening arran ement. In the latter case the ad usting cvices 88 will be merely used for slacking off the conveyor for disassembling purposes. If desired, the upper shaft 89 may be the drive shaft for driving the conveyor.

It will be noted from Fig. 1 that the conveyor sags at its lower part between sprockets 43 and 44, and that it is taut at other places. Thus the conveyor is self-tightening, the part fitting against the barrel heads 38 and 39, being kept tight against these heads by the'weights of the parts of the conveyor between sprockets 43 and 44 on the one hand, and between sprockets 44 and 45 on the other hand. It will be noted that the slack occurs mostly between sprockets 43 and 44 where it can do no harm. The pressure of the conveyor against the barrel heads 38 and 39 causes these heads to rotate as the conveyor moves.

To use the apparatus the door 13 is opened and the articles to be treated are placed in the part of the barrel or pocket formed by the movable segment 5. The door is then closed to the position shown in Fig. 1 and the driving motor (not showrg is started to irection as to cause the conveyor to move in the direction shown by the arrow X in Fig. 1, carrying the articles upward. It will be easily seen that, as these articles are carried upward, they will slide and tumble down continuously as the conveyor moves, exposing all sides thereof to the action of the sand blast coming from the nozzles (not shown) in the nozzle articles removed from the fall between the angle irons or aprons 58 of the conveyor into the pan 48 where the rotating worm conveyor 49 carries it out of the casing 4 to devices (not shown) for recovering the abrasive and using it over again by directing it to the nozzle holders 29.

After the articles have been treated sufi. ficiently, the driving mechanismis stopped, the abrasive blast is shut ofl and the door 13 is opened. The driving motor driving the pulley 82 is reversed, this reversing the motion of the conveyor 5 and quickly carrying the articles out of the charge opening onto the floor or receptacle waiting for them.

Thus it will be seen that the above ,described tumbling mill is rugged in construc tion, simple and efiicient in operation and occupies but small space. The particular com struction of movable conveyor provides a most useful arrangement in which the worn parts may be easily replaced. The working parts are removed, as far as possible, from the direct action of the abrasive of the articles treated.

I This a plication is a continuation in part of appllcation, Serial No. 298,194, filed All St 8,

ile certain novel features of the invention have been shown and described and are i'nted out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.

, links, side walls 'havin efl'ective seal for said chamber.

2. In abrading apparatus, a pair of spaced chains, a connecting member connecting each link of one chain to a corresponding link of the other chain, thereby forming a conveyor, side walls forming with said conveyor a chamber to hold articles, means for supply ing abrasive to said chamber, said members being spaced apart while forming part of said chamber to permit passage of abrasive therebetween, and means for moving said conveyor.

3. In apparatus of the character described,

I a pair of spaced chains, each chain comprising a series of links, each link having a lateral extension ending in a flat seat having a lateral notch, said extension having an up standing diagonal flange extending lengt wiseof the chain and overlapping at its ends the like flanges on adjoining inks, a pair of spaced angle iron aprons seating on each seat with depending flanges in said recess, said chains and aprons forming a conveyor, side walls having recesses for said dia onal flanges to form with said conveyor a c amher for the articles to be treated, and means a roller on sai for moving said conve or.

4. In apparatus of t e character described, a pair of spaced chains, each chain comprisin a series of links, each link having spaced side walls and a connecting top wall, said side walls being spaced apart greater at one end thanat the other to receive the smaller end of the adjoining link, a pin passing through the overlapping side walls of adjoining links,

having a lateral, underribbed extension, said the chain and overlapping at its ends the like flanges on adjoining links, a pair of spaced angle iron aprons seating on each seat with depending flanges in said recess, fastening 1 devices securing said aprons to said seats,

said chains and aprons forming a conveyor,

side walls having recesses for said diagonal flanges to form with said conveyor a chamber for the articles to be treated, sprockets supporting said chains, and means for moving said conveyor.

5. In a tumbling mill, a casing, barrel heads supported by said casing, said heads having annular channels, chains one located outside each head, each chain comprising a series of links, pins connecting said links, each link'ha-vinga lateral extension and an upstanding diagonal flange extending lengthwise of the chain and overlapping at its ends the like flanges on adj oining links, said flanges fitting in said channels, cross members connected to said extensions and extending from one chain to the other, said chains and cross members forming a conveyor extending around the underside of said'heads to form a receptacle for the articles to be treated, sprockets supporting said chains, and means for moving said conveyor.

6. In a tumbling mill, a casing, barrel heads supported by the end Walls of said casing, said heads having annular channels, chains one located outside each head, eachichain comprising a series of links, each link having spaced side walls and a connecting top wall, said side walls. being spaced apart greater at one end than at the other to receive the smaller end of the adjoining link, a pin 'passing through the overlapping side walls-of adjoining links, a roller on said pin, the inner side wall of each link having a lateral, underflat seat having a lateral notch, said extension wise of the chain, said flanges fitting in said ribbed extension, said extension ending in a having an upstandingflangeextending lengthchannels, a pair of spaced angle iron aprons r seating on each seat with depending flanges in 3 said recess, said chains and aprons forming a conveyor extending around the underside of said heads to form a'receptacle forthe articles to be treated, sprockets supporting said chains, and means for moving said coiiveyor. v

7. In a tumbling mill, a casing, barrel heads supported by the end walls of said casing, said heads having annular channels, chains one for eachhead and comprising a series of links, eachv link having spaced side walls and a connecting top wall, said side walls being spaced apart greater at one end than at'the other'to receive the smaller end pin, a 'side wall of each link. of the adjoining link, a pin passing through the overlapping side walls of adjoining links, a roller onsaidpin, a side wall of each link having a'lateral, underribbed extension, said extension ending in a flat seat having a lateral notch, said extension having an upstanding diagonal flange extending lengthwise of the chain and overlapping at its ends the like flanges on adj oining links, said flanges fitting in said channels, a pair of spaced angle iron apronsseating on each seat with dependingflanges-in said recess, fastening devices secursupportingsaid chains, and means for mov-- mg said conveyor.

In testimony whereof I have hereunto set my hand. I

- LOUISD, PEIK.

.ing said aprons to said seats, said chains and aprons forming a conveyor extending around the underside of said heads to form a receplta-cle for the articlesto be treated, sprockets 

